Method of making composite piles.



F. SHUMAN.

METHOD 0T MAKING COMPOSITE PILES.

APPLICATION E'ILED MMI. T. 190e.

Patent-ed Outil?, 1915 un iris FRANK SHM'N, OF PHILADELPHIA,PENNSYLVANIA.

METHD F MAKING .COMPOSITE PILES.

1,156,1se.v

application and nai-ch 7, 190s.

To all whom t may concern.'

' Be it known that l, FRANK SHUMAN, a citizen of the United States,residing in Philadelphia, Pennsylvania, have invented certainImprovements in Methods ofi-Making Composite Pile?, of `which the'following is a specilication.-

The object of my invention is to improve the method of making compositewood and Concrete piles of that class in whioh the base is of wood andthe superstructure is of concrete.

ln the accompanying drawings, Figure l. is a View showing part ot awooden pile and part of the superposed strut-,ture wherebv said pile isdriven below the surface of the ground, the Jfull lines showing therelation of the Wooden pile to the surfare of the ground before suchdriving operation, and the dotted lines showing the relation of the pileto the surface of the ground after the driving operation has beencompleted;

Fig. 2, is a view similar to Fig. l, but illustrating the position ofthe parts after the mass of concrete has been introduced and is about tobe forced into the opening in the ground formed the driving of thewooden pile below the surface.'

Referring in the first inst-ance tov Figs. l and 2, of the drawing, lrepresents the Wooden pile. which is or a length appropriate for thismember of the composite pile. I first drive this wooden pile into theground until its top approaches the surface of the ground, as shown byfull lines in Fig. l. it

the composite pile is to be formed in solid ground, or until the top ofthe wooden pile approaohes the surface of the water, if the pile isbeing driven in submerged ground. `I then provide the wooden pile with acen trai dowel pin 2, which projects some dis-v tance above the top oilsaid wooden pile, and upon the latter are then mounted a driving forni,and, if the pile is to be drivenv under Water a surrounding tubular formintended to form a watertight joint with the top of the wooden pile. Thelatter form may also be employed if the pile is being driven in Wet ormarshy ground, or under any circumstances, where it is des sil-able toprevent water or unstable soil from filling the opening fior-med in theground by driving the wooden pile below the surface.

The driving form consist-s oi a tube 3 pivoted at its upper en d bymeans of a trans- Speccation of Letters Patent.

Patented oct. 12, 1915.

semi No. 304,677.

' verse pin 4 to the driving head 5, which is form 3 is i'n'ovided witha cap 'T secured' thereto by means of a transverse bolt or rivet 8, thiscap providing au extended bearing for the driving form upon the top ofthe wooden pile and having a central opening- 9 preferably tapered. sothat said cap will, by engagement with the dowel pin Q, be guided into acentral position on the top of the wooden pile as it is lowered onto thesame. In order to prevent access to the interior of the tubular drivingform fl through the opening 9. said form has an internal tube 10 for the.reception ot' the dowel pin Q, this tube being closed at its inner endby means of a cap 11 suitably secured to it to effect a tight Closure ofthe upper end oli' the tube.

The waterproofing form-12 surrounds the driving form 3, and consists ota relatively light sheet metal tube of somewhat greater length than thedistance from the under face of the driving head 5 to the under face ofthe cap 7 of the driving form, whereby, when the two forms are firstplaced upon the top of the wooden pile, the cap 7 of the driving Jformwill be supported some little distance above the top of the wooden pile.and the first blow or succession of blows delivered by the pile driverwill be devoted to driving the lower edge. of the tube l2 into the topof the wooden pile l, thus forming a perfectly watertight Iioint betweenthe two by the time lthe cap 7 of the driving 'form contacts with thetop of the wooden pile, as shown in Fig. 1, the force oi the subsequentblows ot the pile driver being then transmitted to the wooden pilethrough the medium of the driving forni 3.

rlhe eonfinen'ient of the upper portion of the pile by the forni l2.also serves to prevent the splitting or splintering ot' said confinedportion of the pile under the blows of the hammer transmitted throughthe medium of the driving form 3.`

Then the wooden pile has been driven t'o the proper depth the driving.,rform 3 is was ` mer other than thewhile the ran'nning of the concrete isbeing effected, thev concrete escaping below the lower edge of the' form12 and filling the opening which has been formed in the ground by thedriving of the pile 1 below the surface of the same. (See Fig. 2.) Aram-- used if desired.

My invention provides method of forming a composite pile iriwhich theconcrete member is tapered or tiered out.-

Wardly from top to bottom.

l .into the waterproofing in"order to increase .The driving form mayflared or'tap'ered, or it collapsible form.

During the introductionof the concrete orm, y any desired be embeddedtherein the strength'of the concrete member of the pile, one such form"of metallic reinforce being shown lin Fig. 2. Said reinforce may beintroduced as e wh'ole before the introduction' ot' the concrete, or

be a tube properly may be c solid or metallic reinforce may lit may be`built up as the concrete gradually .posed end of the driving form nl eybe' a convenient the "-pile;

-i-,isenee fills the'form, for instance the vertical rods 20.me`y beintroduced at first, and, as the concrete is filled im the bracing rings21 v may be successively slippeddown over the rods.. A

The mode 'herein described of forming a composite Wooden and concretepile;l said inode consisting in first driving a wooden pile alone intothe ground to the lextent of its length; second, mounting the drivingform vupon the end of the wooden pile and centering it thereon; placinga casing around the driving form sind resting it upon the exwooden pile;driving the casing into the end of the wooden pile for a given distanceto form a water tight joint; then drivingfthe said wooden pile to apoint below the surface of the medium of the superimposed driving form,the casing being then withdrawing the driving forni', leaving the casingin ltheI ground; and then filling the casing with concrete to complete"the pile structure.

In testimony whereof, l have signed my name to this specification, inthe presence of two subscribingI witnesses.

FRANK SHUMAN.,

Witxsses:

i: ALTER CHIsM. Jos. H. KLEIN.`

driven simultaneously with ground through the

